Chao Wang

Chao Wang
CECO Environmental Corp.

Doctor of Philosophy

About

15
Publications
6,247
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
55
Citations
Citations since 2017
13 Research Items
55 Citations
2017201820192020202120222023051015
2017201820192020202120222023051015
2017201820192020202120222023051015
2017201820192020202120222023051015
Additional affiliations
September 2016 - December 2016
University of Texas at Dallas
Position
  • Research Assistant
Description
  • Being TA for Graduate Fluid Mechanics Course

Publications

Publications (15)
Preprint
The dune morphodynamics study is under highly focused recently, due to aeolian process induced nonlinear correlation to sediment modification over bedform. Surface stress, inflicted by aloft upcoming wind, impacts, crucially, the sediment erosion pattern. The aloft atmospheric dune surface layer (ASL) is composed of inertial layer and roughness sub...
Preprint
Turbulent characteristics within shear layer have been studied, recently, within vegetative canopy, buildings, dunes. Kevin-Helmholtz instability triggered hairpin vortex shedding has been widely concluded as the "signature" of mixing layer analogy. However, convoluted roughness types complicate the observing practice of turbulent evolving progress...
Conference Paper
LES simulation has been used to study inertia-dominated turbulent flows responding to aeolian sand dunes. The former is recovered from simulations initialized with a Reynolds-averaged flow, absent any small-scale features, which highlights the emergence of salient structures within the dune field roughness sublayer. The latter is based upon computa...
Article
Full-text available
Large-eddy simulation has been used to study the formation and spatial nature of inertia-dominated turbulent flows responding to aeolian sand dunes. The former is recovered from simulations initialized with a Reynolds-averaged flow, absent any small-scale features, which highlights the emergence of salient structures within the dune field roughness...
Experiment Findings
Full-text available
Experiment Findings
Full-text available
Conference Paper
The feedback between fluid-flow processes and barchan dune geometry is a key determinant in the evolution of dune fields. Large-eddy simulation was used to model turbulent flow over a series of static barchan dunes. The dune configurations captured realistic stages of a so-called “offset interaction”, wherein a relatively small dune is placed upflo...
Article
Full-text available
The coupling between turbulent flow physics and barchan dune geometry is important to dune migration, morphology of individual dunes, and the morphodynamics of merging and separating proximal dunes. Large-eddy simulation was used to model turbulent, inertial-dominated flow over a series of static barchan dune configurations. The dune configurations...
Conference Paper
Full-text available
Submitted for the DFD17 Meeting of The American Physical Society Large-eddy simulation study of turbulent flow over a complex topography using the terrain-following coordinate transformation method: application to aeolian dunes. JIANZHI YANG, WILLIAM ANDERSON, UT Dallas-Modeling of turbulent flow over complex topography is of great interest in many...
Conference Paper
Full-text available
Submitted for the DFD17 Meeting of The American Physical Society Numerical study of turbulent flow over stages of interacting barchan dunes: sediment scour and vorticity dynamics. CHAO WANG, WILLIAM ANDERSON, UT Dallas-Large-eddy simulation (LES) results of uni-directional turbulent flow over interacting barchan dunes are presented. A series of int...
Conference Paper
Full-text available
Barchan dunes are three- dimensional (3D) topographic features generated by geophysical flows in the presence of sediment mobi- lized over a hardly erodible substrate and are important in a number of engineering and geophysical applica- tions [1]. While barchan dunes are traditionally associ- ated with aeolian environments on the Earth’s surface, s...
Conference Paper
Full-text available
Sand dunes form and evolve in response to flow-induced mobilization of sediment [1]. The morphology of aeolian desert sand dunes is shaped through aeolian process in response to aerodynamic loading from the aloft atmospheric surface layer (ASL) [1, 2]. Similarly, the hydrodynamic loading associated with flows in rivers and channels mobilizes sediment...
Conference Paper
Full-text available
Submitted for the DFD16 Meeting of The American Physical Society Numerical and experimental study of flow over stages of an offset merger dune interaction. 1 CHAO WANG, UT Dallas, ZHANQI TANG, Hebei University of Technology, NATHANIEL BRISTOW, GIANLUCA BLOIS, KEN CHRISTENSEN, University of Notre Dame, WILLIAM ANDERSON, UT Dallas — Results of unidir...

Questions

Question (1)
Question
In order to get a good observation of fluid structure, which one is better, Q-criterion of Lambda-2 criterion? 

Network

Cited By

Projects

Projects (3)
Archived project
NCL Wind Forecasting
Project
Predicting the surface stress and corrosion of dune field in White Sands National Monument in New Mexico, based on the morphodynamics and geological characteristics of sand dunes.
Project
Results of a coordinated research effort on unidirectional turbulent flows over canonical barchan dunes at high Reynolds number are presented. Large-eddy simulations (LES) and experiments are conducted under inertial-dominated flow conditions, thus capturing dynamics essential to fully understanding processes responsible for observed patterns of asymmetric erosion and migration. A series of dune field topographies have been considered wherein a small ``impactor'' dune is positioned at a series of positions upflow of a large ``parent'' dune, from a spanwise-offset position; this interaction constitutes a so-called ``offset interaction'' (Kocurek and Ewing, 2005: \textit{Geomorph.} \textbf{72}). The small dune is geometrically similar, but one-eighth the volume of the large dune. Since migration rate is inversely proportional to volume, the prescribed volumetric ratio ensures that the synthetic topographies replicate instantaneous configurations exhibited during actual dune interactions in a laboratory or natural setting. In this sense, the static dune configurations provide a means to understand flow processes responsible for patterns of erosion and deposition that induce interactions. Experimental measurement and LES are both used to study these configurations, with strong agreement reported between resultant datasets. We report that flow channeling in the interdune space between the upflow and downflow dune induces a mean flow heterogeneity -- termed ``wake veering'' -- in which the location of maximum momentum deficit in the dune wake is spanwise displaced. We also report elevated turbulent stresses in the channeling region. These results are used to explain the mechanisms responsible for simultaneous merging and ejection between the small and large dunes. Finally, spatial distributions of surface stress from LES have been used to identify locations of elevated erosion and, therefore, to predict bedform migration patterns. Results show that locations of minimal erosion -- whether associated with upflow sheltering or with vanishing spatial gradients of dune height -- constitute spatial ``junctions'' of coalescing, proximal dunes. In the absence of upwind sheltering, or in locations with the least upwind sheltering, turbulent mixing facilitates downward fluxes of high momentum fluid. This augments downwind dune erosion, cumulatively accelerating the migration of downwind dunes.